Esperanto (n.) Look up Esperanto at Dictionary.com
1892, from Doktoro Esperanto, whose name means in Esperanto, "one who hopes," pen name used on the title page of a book about the artificial would-be universal language published 1887 by its inventor, Lazarus Ludwig Zamenhof (1859-1917). Compare Spanish esperanza "hope," from esperar, from Latin sperare (see sperate). For initial e- see e-.